U.S. patent application number 09/894231 was filed with the patent office on 2002-01-03 for color type liquid crystal display having a high aperture ratio.
Invention is credited to Byun, Byung Hyun, Seo, Jin Yong.
Application Number | 20020001054 09/894231 |
Document ID | / |
Family ID | 19674923 |
Filed Date | 2002-01-03 |
United States Patent
Application |
20020001054 |
Kind Code |
A1 |
Byun, Byung Hyun ; et
al. |
January 3, 2002 |
Color type liquid crystal display having a high aperture ratio
Abstract
The present invention relates to a color type liquid crystal
display having a high aperture ratio, comprising a first substrate
which has black matrixes of a color filter arranged in a stripe and
a second substrate which has black matrixes in a stripe
perpendicular to the black matrixes of the color filter. The
disclosed has a large alignment margin without deterioration when
an upper and a lower substrates of color type STN are assembled
each other, thereby increasing an aperture ratio and yield and
decreasing power consumption.
Inventors: |
Byun, Byung Hyun; (Daejeon,
KR) ; Seo, Jin Yong; (Kyoungki-do, KR) |
Correspondence
Address: |
Ladas & Parry
Suite 1200
224 South Michigan Avenue
Chicago
IL
60604
US
|
Family ID: |
19674923 |
Appl. No.: |
09/894231 |
Filed: |
June 28, 2001 |
Current U.S.
Class: |
349/106 |
Current CPC
Class: |
G02F 1/133512
20130101 |
Class at
Publication: |
349/106 |
International
Class: |
G02F 001/1335 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 29, 2000 |
KR |
2000-36599 |
Claims
What is claimed is:
1. A color type liquid crystal display comprising: a first
substrate which has black matrixes of a color filter arranged in a
stripe; and a second substrate which has black matrixes in a stripe
perpendicular to the black matrixes of the color filter.
2. The color type liquid crystal display according to claim 1,
wherein the color filter is employed in either an upper substrate
or a lower substrate.
3. The color type liquid crystal display according to claim 1,
wherein the color filter has black matrixes arranged perpendicular
to each other.
4. The color type liquid crystal display according to claim 1,
wherein the color filter has black matrixes in parallel to each
other.
5. The color type liquid crystal display according to claim 1,
wherein the color filter is a lower substrate and the second
substrate is an upper substrate.
Description
BACKGROUND OF THE INVENTION
[0001] Field of the Invention
[0002] The present invention relates to a color type liquid crystal
display having a high aperture ratio, and more particularly to a
color type liquid crystal display having a wide alignment margin
when upper and lower substrates are assembled including a color
type super twisted nematic (STN).
[0003] Generally, a liquid crystal display comprises upper and
lower substrates, opposite to each other, a liquid crystal
interposed between them and a polarizing plate disposed on the
outer surface of substrates.
[0004] The upper substrate is referred to as a color filter
substrate since a color filter is attached thereon to realize a
color type liquid crystal display. The lower substrate is referred
to as a TFT (thin film transistor) array substrate since pixel
electrodes and thin film transistors are formed thereon in an
active matrix type.
[0005] The color filter comprises red (R), green (G) and blue (B)
color pixels and a black matrix around the color pixels. The black
matrix corresponds to a gate bus line, a data bus line and a thin
film transistor of TFT array substrate and color pixels correspond
to pixel electrodes.
[0006] A conventional method of fabricating a liquid crystal
display will be described in detail with reference to FIG. 1.
[0007] FIG. 1 is a layout for showing a color filter substrate of
color TN/STN type LCD employing a conventional micro color
filter.
[0008] Referring to FIG. 1, a color filter substrate of color
TN/STN type LCD employing a conventional micro color filter 3 is
fabricated by forming a black matrix 2 of lattice type and then
forming red (R), green (G) and blue (B) color resists as shown in
FIG. 1. Subsequently, an overcoat (not illustrated) is formed to
have a cell gap uniformity and an ITO 4 is formed thereon and
patterned, thereby completing the formation of color filter
substrate.
[0009] The above color filter substrate is employed as a lower
substrate, and then as shown in FIG. 2, an upper substrate is
formed with a structure having ITO patterns 6 in a stripe type. The
upper and lower substrates are combined by forming alignment layers
thereon and then sealed by liquid crystals to complete a panel. A
compensating film and a polarizing plate are attached to each side
of the panel, thereby completing color TN/STN type LCD.
[0010] However, the conventional method has problems that it is
difficult to obtain an alignment of 10 .mu.m when the substrates
are combined and an aperture ratio is decreased by enlarging the
black matrix.
SUMMARY OF THE INVENTION
[0011] The present invention has been made to solve the
above-mentioned problems. The object of the present invention is to
provide a color type liquid crystal display having a high aperture
ratio and a large alignment margin when upper and lower substrates
are assembled.
[0012] In order to achieve the above object, a color type liquid
crystal display having a high aperture ratio of the present
invention comprises a first substrate which has black matrixes of a
color filter arranged in a stripe; and a second substrate which has
black matrixes in a stripe perpendicular to the black matrixes of
the color filter.
[0013] According to a preferred embodiment of the present
invention, the color filter is employed in either upper or lower
substrate.
[0014] According to another embodiment of the present invention,
the black matrix of color filter is perpendicular to color
pixels.
[0015] According to still another embodiment of the present
invention, the black matrix of color filter is parallel to color
pixels.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] FIG. 1 is a layout for showing a color filter substrate of
color TN/STN type LCD employing a conventional micro color
filter.
[0017] FIG. 2 is a layout for showing an upper substrate for a
color STN according to a conventional method.
[0018] FIG. 3 is a layout for showing a color filter substrate of
color type liquid crystal display according to the present
invention.
[0019] FIG. 4 is a layout for showing a panel of color type liquid
crystal display according to the present invention.
DETAILED DESCRIPTION OF THE DRAWINGS
[0020] The above object, and other features and advantages of the
present invention will become more apparent after reading the
following detailed description when taken in conjunction with the
drawings.
[0021] FIG. 3 is a layout for showing a color filter of color type
liquid crystal display according to the present invention.
[0022] Referring to FIG. 3, black stripes 12 are formed in a stripe
type on a lower glass substrate 11 and red (R), green (G) and blue
(B) color resists 13 are formed in a stripe type being parallel
with the black stripes 12. Thereafter, an overcoat (not
illustrated) and an ITO 14 are deposited and selectively patterned
and finally, an alignment layer is formed, thereby completing a
lower substrate.
[0023] FIG. 4 is a layout for showing a panel of color type liquid
crystal display according to the present invention.
[0024] Referring to FIG. 4, black stripes 22 are formed
perpendicular to the black stripes 12 of the lower substrate. And
then, an ITO 24 is deposited and selectively patterned and finally,
an alignment layer is formed, thereby completing an upper
substrate.
[0025] The resulting upper and lower substrates are combined and
then, provided with liquid crystal therein and sealed, thereby
completing a panel. Compensating films and polarizing plates are
attached to both sides of the panel to form a color TN/STN.
[0026] As described above, according to the present invention,
alignment margin and aperture ratio are increased, thereby reducing
production cost.
[0027] The invention may be embodied in other specific forms
without departing form the spirit or essential characteristics
thereof. The present embodiment is therefore to be considered in
all respects as illustrative and not restrictive. And all changes
which come within the meaning and range of equivalency of the
claims are therefore intended to be embraced therein.
* * * * *